111 Main Street

A 35 foot glazed facade system for the newest addition to Salt Lake City's skyline, to withstand the seismic pressures of an earthquake or windstorm. 


Images: Eckersley O'Callaghan, SOM LLP  |  Ceser Rubio


Salt Lake City, UT







111 Main has become the newest addition to the Salt Lake City skyline. The column-free building design relies on all 24 floors being supported by tension members hung from the roof.


Eckersley O’Callaghan acted as the Engineer of Record for the design of the custom all-glass lobby facade system. The slender building core is set back from the perimeter which allows for an expansive forty foot tall lobby entrance.


However, this also results in significant building movements in the event of a wind storm or earthquake. While all floor plates move together uniformly, a key challenge was presented at the interface between the hanging building and the entry-level facade that is base supported on the ground.


A study of movements, rotations, supports, and rigidity was conducted to define a system that would accommodate the immense imposed building deflections. 

A kinetic hinge system was developed to accommodate total building vertical movements of 3ft while precision linear slide bearings were employed to absorb lateral building drifts.


Large cantilever structural steel entry portals were designed integrally with the glazed facade system. Incorporation of architectural timber fins was accomplished with a novel approach to laminate wood veneer into the glass assemblies.


Detailed analysis of global movements, post-failure behaviour, gasket and sealant flexibility, was carried out as part of the delegated design requirements to ensure performance through the building’s design life.

111 Main Street

111 Main Street

Salt Lake City

UT 84133



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